I have one comment to the paragraph quoted below from the Aerotropolis article
The consumer population of airports is greater than might be realised, and much larger than that of tourist sites. For example95 million people passed through Atlanta Airport last year, while only 40 million visited Disneyworld and the Grand Canyon combined.
Big tourist attractions like Disneyland and Grand Canyon only count visitor IN to the attraction - airports count both inbound AND outbound. In other words the difference isn't that big as Professor Kasarda try to show when you count visitors (people), but the hassle is larger passing through an airport (border control, baggage claim and customs inbound and check in and security check outbound).